The Booty Belts adjustable velcro belt is made of commercial-grade, double layered nylon (similar to seat belt material). The booty bands slide to the specified width of your waist/hips. The bands are commercial-grade "pro" bands with double-dipped natural latex tubing that stretches to more than three times the length. The color coating represents the different levels of resistance. The foot straps are made of nylon and velcro. There is a neoprene pad in each foot strap for comfort, so the Booty Belt can be used barefoot or while wearing athletic shoes. There are no height or weight restrictions. If it's comfortable enough to perform the exercises then you should be able to use it. Consult with your physician first.